Saarti, S
Hajj, A
Karam, L
Jabbour, H
Sarkis, A
El Osta, N
Rabbaa Khabbaz, L
Article History
Received: 29 January 2015
Revised: 23 April 2015
Accepted: 7 May 2015
First Online: 27 August 2015
Competing interests
: The authors declare no conflict of interest.